Packaging tool and packaging box

ABSTRACT

A packaging tool includes: a mounting part including a rectangular mounting surface for mounting an object to be packaged thereon; a pair of one and another pressing pieces provided to be able to bend and stand upward via another pair of bend lines, on another pair of opposed sides of the mounting surface respectively; and a pair of one and another coupling pieces which couple opposed side ends of the one and another pressing pieces to keep a standing state of the one and another standing pieces, and is configured to be able to be housed in a packaging box with the pressing pieces standing and coupled by the pair of coupling pieces. A pair of standing pieces capable of bending and standing upward may be provided on one pair of opposed sides of the mounting part. Since the mounting part is surrounded by the pressing pieces and the coupling pieces, it is possible to effectively prevent rolling of the object to be packaged mounted on the mounting surface.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to both Japanese Patent Application No. 2018-074872 filed on Apr. 9, 2018 and Japanese Patent Application No. 2018-102734 filed on May 29, 2018. The foregoing applications are incorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION 1. Field of the Invention

The present invention relates to a packaging tool for packaging an object to be packaged, and a packaging box for housing the packaging tool therein.

2. Description of the Related Art

Due to popularization of mail order such as Internet shopping, a demand for delivery of a relatively small packet to an individual house rapidly increases. The commercial products to be delivered are various in shape and size, and some of them change in shape such as a bag of shampoo. Such various objects to be packaged are put into boxes, and therefore a packaging tool and a packaging box enabling efficient packaging and delivery in a stable state are required.

As the packaging tool of this kind, there is a known packaging tool which includes: a mounting part for mounting an object to be packaged thereon and a plate-like member having a pair of standing parts provided continuously thereto via bend lines on both sides of the mounting part respectively; and a heat-shrinkable thin film member which is cylindrical and into which the plate-like member is inserted in a manner to cover at least the mounting part, wherein the plate-like member is deformable from a flat exploded state into a standing state with the standing parts bent upward. The mounting part of this packaging tool is formed such that the length of a middle part parallel to both edge parts along edges of the plate-like member is larger than the length of the edge parts in the exploded state, and is curved such that the middle part is located above both the edge parts in the standing state.

The mounting part formed of a corrugated cardboard is curved to be along a concave shape when the standing parts are made to stand, so that the middle part is located above both the edge parts. As a result of this, the object to be packaged on the mounting part is pushed upward, so that the thin film member is pulled to the upper side via the object to be packaged and becomes tense for holding the object to be packaged with reaction force thereto.

Patent Document 1: Japanese Laid-open Patent Publication No. 2018-2170

SUMMARY OF THE INVENTION

However, formation of the length of the middle part parallel to both the edge parts along the edges of the plate-like member larger than the length of the edge parts brings about a problem of a work of standing the standing parts becoming necessarily complicated. Another problem is that the standing parts prevent rolling of the object to be packaged at the time of packaging but there is 8 nothing provided in a direction of two sides, of four sides of the mounting part, where the standing parts are not formed, so that rolling cannot be prevented. For example, at the time of packaging a cylindrical product such as a spray can, it can be considered that it may be necessary to perform the work while pressing the spray can by one hand. Besides, there may be a case where a plurality of stacked bags of shampoo collapse. If it is necessary to pay attention to the cases, those works are also causes of complication.

An object of the present invention in consideration of the above problems is to provide a packaging tool and a packaging box allowing a packaging work to be performed without careful attention paid to rolling of an object to be packaged.

To achieve the above object, the present invention includes the following features. Note that the definition and the like of words and terms performed in describing the invention as set forth in any of claims are assumed to be applied to the inventions as set forth in other claims regardless of the order of the description. Further, though the expressions “one” and “another” are used, they are not intended to specify any one of them but is indicate the relation that when one is arbitrarily decided, another is decided in response to that.

(Feature of Invention of Claim 1)

A packaging tool according to the invention of claim 1 (hereinafter, referred to as a “packaging tool of claim 1”) includes: a mounting part including a rectangular mounting surface having one pair of opposed sides and another pair of opposed sides, for mounting an object to be packaged thereon; a pair of one and another pressing pieces provided to be able to bend and stand upward via another pair of bend lines, on the another pair of opposed sides of the mounting surface respectively; and a pair of one and another coupling pieces which couple opposed side ends of the one and another pressing pieces to keep a standing state of the one and another standing pieces, and configured to be able to be housed in a packaging box with the pressing pieces standing and coupled by the pair of coupling pieces.

According to the packaging tool of claim 1, an upper space of the mounting surface is surrounded by the pair of pressing pieces and the pair of coupling pieces, so that even when the object to be packaged mounted on the mounting surface rolls or collapses, further movement is prevented. Therefore, the packaging work can be performed without careful attention paid to the rolling or collapse. In this state, it is possible to cover the mounted object to be packaged by the heat-shrinkable film, together with the packaging tool except the pair of standing pieces, and to effectively prevent rolling and collapse at that time. It is possible to form, as needed, an adhesive layer for restricting the movement of the packaging tool, between the bottom surface of the packaging box for housing the packaging tool therein and the lower surface of the mounting part.

(Feature of Invention of Claim 2)

A packaging tool according to the invention of claim 2 (hereinafter, referred to as a “packaging tool of claim 2”) is the packaging tool according to claim 1, further including: a pair of one and another standing pieces provided to be able to bend and stand upward via one pair of bend lines, on the one pair of opposed sides of the mounting part respectively.

According to the packaging tool of claim 2, at the time of trying to pull up the packaging tool for transporting it or putting it into a packaging box, a user can accomplish the purpose only by grasping the pair of standing pieces by hands. There is a case where it is hard to pull up the packaging tool when the object to be packaged is mounted, in particular, the heat-shrinkable film is covered thereon, but the work can be easily performed by grasping the standing pieces.

(Feature of Invention of Claim 3)

A packaging tool according to the invention of claim 3 (hereinafter, referred to as a “packaging tool of claim 3”) is a packaging tool including: a mounting part including a rectangular mounting surface having one pair of opposed sides and another pair of opposed sides, for mounting an object to be packaged thereon; and a pair of one and another standing pieces provided to be able to bend and stand upward via one pair of bend lines, on the one pair of opposed sides of the mounting part respectively, and configured to be able to be housed in a packaging box with the standing pieces bending and standing upward. The packaging tool further includes: a pair of one and another pressing pieces provided to be able to bend and stand upward via another pair of bend lines, on the another pair of opposed sides of the mounting surface respectively; and a pair of one and another coupling pieces which couple opposed side ends of the one and another pressing pieces to keep a standing state of the one and another standing pieces.

According to the packaging tool of claim 3, an upper space of the mounting surface is surrounded by the pair of pressing pieces and the pair of coupling pieces, so that even when the object to be packaged mounted on the mounting surface rolls or collapses, further movement is prevented. Therefore, the packaging work can be performed without careful attention paid to the rolling or collapse. In this state, it is possible to cover the mounted object to be packaged by the heat-shrinkable film, together with the packaging tool except the pair of standing pieces, and to effectively prevent rolling and collapse at that time. Further, at the time of trying to pull up the packaging tool for transporting it or putting it into a packaging box, a user can accomplish the purpose only by grasping the pair of standing pieces by hands. There is a case where it is hard to pull up the packaging tool when the object to be packaged is mounted, in particular, the heat-shrinkable film is covered thereon, but the work can be easily performed by grasping the standing pieces.

(Feature of Invention of Claim 4)

A packaging tool according to the invention of claim 4 (hereinafter, referred to as a “packaging tool of claim 4”) is the packaging tool according to any one of claims 1 to 3, wherein: one trapezoidal part is provided continuously at an upper end of the one pressing piece, the one trapezoidal part having a lower bottom of the same length as a length of the upper end of the one pressing piece and tapering upward; and another trapezoidal part is provided continuously at an upper end of the another pressing piece, the another trapezoidal part having a lower bottom of the same length as a length of the upper end of the another pressing piece and tapering upward.

According to the packaging tool of claim 4, the one and another pressing pieces establish a state of restricting freedom, namely, a state of surely holding the object to be packaged. Contrarily, the one and another trapezoidal parts are not constrained by the pressing pieces and are made to taper, and are therefore pliable in directions of covering over the object to be packaged. Though the pliability is not essential, for example, when the object to be packaged is covered by the heat-shrinkable film, the object to be packaged can be surely protected and held by the trapezoidal parts covering over the object to be packaged by the tension of the heat-shrinkable film. In this event, the tops of the trapezoidal parts are not sharp, and therefore never stick into and break the heat-shrinkable film.

(Feature of Invention of Claim 5)

A packaging tool according to the invention of claim 5 (hereinafter, referred to as a “packaging tool of claim 5”) is the packaging tool according to claim 4, wherein the one coupling piece includes one and another coupling small pieces configured to be able to bend in opposed directions via bend lines from the one pressing piece and the another pressing piece respectively; and the another coupling piece includes one and another coupling small pieces configured to be able to bend in opposed directions via bend lines from the one pressing piece and the another pressing piece respectively, and the packaging tool further including: one detachable coupling structure between the one coupling small piece and the another coupling small piece opposed thereto; and another detachable coupling structure between the one coupling small piece and the another coupling small piece opposed thereto.

According to the packaging tool of claim 5, though not essential, the whole packaging tool can be composed of a sheet (for example, corrugated cardboard). In other words, by cutting a sheet into a predetermined shape and forming necessary bend lines thereon, it is possible to form the mounting part, the pair of standing pieces, the pair of pressing pieces, and the pair of coupling pieces bent up. At each of the pair of coupling pieces, the one coupling small piece and the another coupling small piece which are bent up only need to be coupled by the coupling structure. Since the coupling structure is detachable, by releasing the coupling after use, the packaging tool can be returned into a sheet. Discard is easy and reuse becomes possible.

(Feature of Invention of Claim 6)

A packaging tool according to the invention of claim 6 (hereinafter, referred to as a “packaging tool of claim 6”) is the packaging tool according to claim 5, wherein: an upper end of the one coupling piece when coupled by the one coupling structure is formed almost parallel to the mounting surface, and one pair of trapezoidal parts having a lower bottom of the same length as a length of the upper end and tapering upward are provided continuously at the upper end; an upper end of the another coupling piece when coupled by the another coupling structure is formed almost parallel to the mounting surface, and another pair of trapezoidal parts having a lower bottom of the same length as a length of the upper end of the another coupling piece and tapering upward are provided continuously at the upper end; the one coupling structure is formed across the one coupling piece and the one pair of trapezoidal parts; and the another coupling structure is formed across the another coupling piece and the another pair of trapezoidal parts.

According to the packaging tool of claim 6, the one and another coupling pieces establish a state of restricting freedom, namely, a state of surely holding the object to be packaged. Contrarily, the one and another trapezoidal parts are not constrained by the coupling pieces and are made to taper, and are therefore pliable in directions of covering over the object to be packaged. Though the pliability is not essential, for example, when the object to be packaged is covered by the heat-shrinkable film, the object to be packaged can be surely protected and held by the trapezoidal parts covering over the object to be packaged by the tension of the heat-shrinkable film. In this event, the tops of the trapezoidal parts are not sharp, and therefore never stick into and break the heat-shrinkable film.

(Feature of Invention of Claim 7)

A packaging tool according to the invention of claim 7 (hereinafter, referred to as a “packaging tool of claim 7”) is the packaging tool according to any one of claims 2 to 6, further including: a cylindrical heat-shrinkable film penetrating in a direction of the pair of pressing pieces, wherein the heat-shrinkable film is capable of covering by heat shrinkage a part or whole of the packaging tool except the pair of standing pieces, together with the object to be packaged mounted on the mounting surface.

According to the packaging tool of claim 7, the heat-shrinkable film covers a part or whole of the packaging tool except the pair of standing pieces, together with the object to be packaged, and thereby can surely hold the object to be packaged. On the other hand, the pair of standing pieces are not covered and are in a free state, thus enabling the object to be packaged to be easily put into/out of the packaging box by grasping the standing pieces by hands.

(Feature of Invention of Claim 8)

A packaging box according to the invention of claim 8 (hereinafter, referred to as a “packaging tool of claim 8”) is a packaging box for housing the packaging tool according to any one of claims 2 to 7 and having an upper part being openable and closable, formed in dimensions capable of restricting movements in horizontal and vertical directions of the packaging tool when the packaging tool is housed therein with the standing pieces standing and the upper part is closed.

According to the packaging box of claim 8, the mounting part of the housed packaging tool mainly restricts the movement in the horizontal direction and the pair of standing pieces mainly restrict the movement in the vertical direction. Though not prohibiting the formation of an adhesive layer between the bottom surface of the packaging box and the lower surface of the mounting part, the restriction of the movements eliminates the need to bond the rear surface of the mounting part to the packaging box, thus facilitating the packaging work. Besides, at the time of taking out the object to be packaged, it is only necessary to grasp the pair of standing pieces and pull up the object to be packaged, so that the packaging box is very convenient. Using no adhesive leads to eliminate the environmental load.

(Feature of Invention of Claim 9)

A packaging tool according to the invention of claim 9 (hereinafter, referred to as a “packaging tool of claim 9”) is the packaging tool according to claim 1, further including: a cylindrical heat-shrinkable film penetrating in a direction of the pair of pressing pieces, wherein the heat-shrinkable film is capable of covering by heat shrinkage a part or whole of the packaging tool, together with the object to be packaged mounted on the mounting surface.

According to the present invention, it is possible to provide a packaging tool and a packaging box allowing a packaging work to be performed without careful attention paid to rolling of an object to be packaged.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a packaging tool and a packaging box in the present embodiment.

FIG. 2 is an exploded plan view of the packaging tool in the present embodiment.

FIG. 3 is a perspective view of the assembled packaging tool in the present embodiment.

FIG. 4 is a perspective view of a packaging tool and a packaging box in the present modified example.

FIG. 5 is an exploded plan view of the packaging tool in the present modified example.

FIG. 6 is a perspective view of the assembled packaging tool in the present modified example.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT(S) (Packaging Tool and Packaging Box)

An embodiment of the present invention (hereinafter, referred to as “the present embodiment”) will be described based on the drawings. As illustrated in FIG. 1, a packaging tool 1 of the present embodiment preferably includes a plate-shaped member 3 created, for example, by stamping it out from a sheet of corrugated cardboard, and a heat-shrinkable film (thin film member) 5 covering an object to be packaged as needed. The packaging tool 1 is for holding an object to be packaged G between a part of the plate-shaped member 3 and the heat-shrinkable film 5 and housing the object to be packaged G into a packaging box 9. The packaging box 9 is configured such that upper covers 9 a to 9 d thereof can be opened/closed, and may be used as a packaging box as it is or may be housed in a larger packaging box in a manner that two or more boxes are placed side by side or stacked one on the other though not illustrated.

(Schematic Configuration of Plate-Shaped Member)

As illustrated in FIG. 2 and FIG. 3, the plate-shaped member 3 is schematically composed of a mounting part 11, a pair of standing pieces 13 a, 13 b, a pair of pressing pieces 15 a, 15 b, and a pair of coupling pieces 17 a, 17 b which form a pair after assembly.

The mounting part 11 includes a mounting surface 11 a which is an upper surface when placed on a table or the like, for mounting the object to be packaged G thereon. The mounting surface 11 a is rectangular and various in size depending on the size, the shape and the number of the objects to be packaged. For example, to package, in a stacked state, a cylindrical container made of a synthetic resin containing a hair treatment therein and two flexible containers containing refill liquid for the hair treatment therein, namely, three containers in total as the object to be packaged group G, for example, a mounting surface having dimensions such as a long side of 25 cm and a short side of 18 cm can be preferably used (hereinafter, a packaging tool having the dimensions and dimensions described below is called a “sample packaging tool”).

(Structure of Standing Piece)

As illustrated in FIG. 2, at four sides surrounding the mounting part (mounting surface 11 a), bend lines 11 k, 11 k are formed at one pair of opposed sides and bend lines 11 m, 11 m are formed at another pair of opposed sides. Here, a pair of one and another standing pieces 13 a, 13 b are formed via the bend lines 11 k, 11 k. The standing pieces 13 a, 13 b are rectangular pieces which can bend and stand upward (to this side of a paper surface on FIG. 2) via the bend lines 11 k, 11 k respectively. A height dimension of the standing piece in the sample packaging tool viewed from the mounting surface 11 a is generally about 12 cm. As will be described later, preferable standing pieces 13 a, 13 b have at least a function of allowing fingers to grasp them at the time of inserting the object to be packaged G (FIG. 1) into the packaging box 9 when housing it or at the time of conversely taking it out, and a function of restricting mainly a vertical movement in the packaging box 9.

(Structure of Pressing Piece)

At the bend lines 11 m, 11 m, a pair of pressing pieces 15 a, 15 b are formed. The pressing pieces 15 a, 15 b are rectangular pieces which can bend and stand upward via the bend lines 11 m, 11 m. Preferably, at upper ends of the one and another pressing pieces 15 a, 15 b, one and another trapezoidal parts 15 ad, 15 bd having lower bottoms of the same lengths as those of the pressing pieces 15 a, 15 b and tapering upward are continuously provided.

(Structure of Coupling Piece)

On both sides of the pressing piece 15 a, one coupling small piece 17 ap and one coupling small piece 17 bp are configured to be able to bend, via bend lines 15 s, 15 s, in directions of both sides of the opposed pressing piece 15 b. On the other hand, on both sides of the pressing piece 15 b, another coupling small piece 17 ap′ and another coupling small piece 17 bp′ are configured to be able to bend, via bend lines 15 s, 15 s, in directions of both sides of the opposed pressing piece 15 a.

(Configuration of Coupling Structure)

At the end on the side of the coupling small piece 17 ap opposite to the bend line 15 s, a mountain part 19 an is formed, and a narrow valley part 19 as is formed on the bend line 15 s side of the mountain part 19 an. The valley part 19 as is open at the upper end and formed to be almost parallel to the bend line 15 s. On the other hand, at the end on the side of the coupling small piece 17 ap′ opposite to the bend line 15 s, an inverted mountain part 19 an′ is formed, and a narrow inverted valley part 19 as′ is formed on the bend line 15 s side of the inverted mountain part 19 an′. The valley part 19 as′ is open at the lower end and formed to be almost parallel to the bend line 15 s. Here, the coupling small piece 17 ap and the coupling small piece 17 ap′ are bent at the bend line 15 s, 15 s respectively toward the coupling small pieces opposed to each other. At this time, additionally, the mountain part 19 an is inserted into the inverted valley part 19 as′ and the inverted mountain part 19 an′ is inserted into the valley part 19 as, whereby both the coupling small pieces 17 ap, 17 ap′ are detachably coupled together in an almost linear state. The mountain part 19 an, the valley part 19 as, the inverted mountain part 19 an′, and the inverted valley part 19 as′ constitute one coupling structure 19 a of the present embodiment.

Next, another coupling structure 19 b will be described. The coupling structure 19 b has the same structure as that of the one coupling structure 19 a. More specifically, at the end on the side of the coupling small piece 17 bp opposite to the bend line 15 s, a mountain part 19 bn is formed, and a narrow valley part 19 bs is formed on the bend line 15 s side of the mountain part 19 bn. The valley part 19 bs is open at the upper end and formed to be almost parallel to the bend line 15 s. On the other hand, at the end on the side of the coupling small piece 17 bp′ opposite to the bend line 15 s, an inverted mountain part 19 bn′ is formed, and a narrow inverted valley part 19 bs′ is formed on the bend line 15 s side of the inverted mountain part 19 bn′. The valley part 19 bs′ is open at the lower end and formed to be almost parallel to the bend line 15 s. Here, the coupling small piece 17 bp and the coupling small piece 17 bp′ are bent at the bend line 15 s, 15 s respectively toward the coupling small pieces opposed to each other. At this time, additionally the mountain part 19 bn is inserted into the inverted valley part 19 bs′ and the inverted mountain part 19 bn′ is inserted into the valley part 19 bs, whereby both the coupling small pieces 17 bp, 17 bp′ are detachably coupled together in an almost linear state. The mountain part 19 bn, the valley part 19 bs, the inverted mountain part 19 bn′, and the inverted valley part 19 bs′ constitute the other coupling structure 19 b of the present embodiment.

To couple the coupling structure 19 a and the coupling structure 19 b, first, the pressing piece 15 a and the pressing piece 15 b need to be made to stand. This is because by bending the coupling small pieces 17 ap, 17 ap′, 17 bp, 17 bp′ in a state where the pressing pieces 15 a, 15 b are made to stand, the coupling structure 19 a and the coupling structure 19 b can be made to function. Coupling of the coupling structure 19 a and the coupling structure 19 b causes the coupling small pieces 17 ap, 17 ap′, 17 bp, 17 bp′ to stand and surround, in conjunction with the pressing pieces 15 a, 15 b, the object to be packaged G mounted on the mounting surface 11 a. The surrounding prevents the object to be packaged G from rolling down or collapsing from the top of the mounting surface 11 a.

A virtual upper end of the coupling piece 17 a (not distinctively indicated in FIG. 2 and so on) when coupled by the one coupling structure 19 a is formed to be almost parallel to the mounting surface 11 a, and at the upper end, trapezoidal parts 17 ad having a lower bottom of the same length as a length of the upper end and tapering upward are continuously provided. Further, an upper end of the coupling piece 17 b (not distinctively indicated in FIG. 2 and so on) when coupled by the coupling structure 19 b is formed to be almost parallel to the mounting surface 11 a, and at the upper end, trapezoidal parts 17 bd having a lower bottom of the same length as a length of the upper end of the coupling piece 17 b and tapering upward are continuously provided. Here, the coupling structure 19 a is formed across the coupling piece 17 a and the trapezoidal parts 17 ad, and the coupling structure 19 b is formed across the coupling piece 17 b and the trapezoidal parts 17 bd.

(Heat-Shrinkable Film)

The heat-shrinkable film 5 is preferably made by heat shrinkage into a size capable of covering a part or whole of the packaging tool 1 expect the pair of standing pieces 13 a, 13 b, together with the object to be packaged G mounted on the mounting surface 11 a. It is desirable to select a heat-shrinkable film having a material, size and heat shrinkage percentage so that the trapezoidal parts 15 ad, 15 bd, 17 ad, 17 bd are curved by heat shrinkage through the covering to cover over the object to be packaged G. This is to prevent rolling and collapse during transport by firmly holding the object to be packaged G.

(Packaging Procedure)

Next, the procedure of packaging the object to be packaged G using the packaging tool 1 will be described referring to FIG. 1 to FIG. 3.

First, the pressing pieces 15 a, 15 b are bent up along the bend lines 11 m, 11 m in the state illustrated in FIG. 2. Next, the coupling small pieces 17 ap, 17 ap′, 17 bp, 17 bp′ are bent along the bend lines 15 s, 15 s, 15 s, 15 s and coupled by the coupling structures 19 a, 19 b to complete the coupling pieces 17 a, 17 b. In this event, the pair of standing pieces 13 a, 13 b are not bent up but are left as they are. At this time, the mounting surface 11 a is in a state where lateral four sides are surrounded by the pressing pieces 15 a, 15 b and the coupling pieces 17 a, 17 b.

Here, the object to be packaged G is mounted on the mounting surface 11 a and a portion except the pair of standing pieces 13 a, 13 b is covered by the heat-shrinkable film 5. In this state, the object to be packaged G is substantially enclosed by the mounting part 11 at the lower side, by the pressing pieces 15 a, 15 b and the coupling pieces 17 a, 17 b at the lateral four sides, and by the trapezoidal parts 15 ad, 15 bd, 17 ad, 17 bd at the upper side, and the heat-shrinkable film further covers the outside of them. Accordingly, the object to be packaged G is integrated with the packaging tool 1, and therefore prevented from displacement, rolling and collapse. As repeatedly mentioned, the pair of standing pieces 13 a, 13 b are not covered but are in a free state.

Here, the pair of standing pieces 13 a, 13 b are made to stand, the packaging tool 1 and the object to be packaged (G is housed, while grasping the standing pieces 13 a, 13 b, into the packaging box 9 with the upper covers 9 a to 9 d thereabove opened, and the upper covers 9 a to 9 d are closed and sealed with an adhesive tape (not illustrated), with which the packaging work is completed. The inner dimensions of the packaging box 9 are made to almost coincide with the maximum dimensions of the mounting part 11 and the standing pieces 13 a, 13 b, so that the movement of the packaging tool 1 and the object to be packaged G is restricted in the packaging box 9. Thus, it does need to bond the packaging tool 1 to the packaging box using an adhesive or the like.

For taking-out of the object to be packaged G, it is only necessary to open the upper covers 9 a to 9 d and grasp and pull up the standing pieces 13 a, 13 b. Then, by breaking the heat-shrinkable film 5, the object to be packaged G can be taken. The packaging tool 1 after removing the heat-shrinkable film is returned into a sheet of corrugated cardboard by releasing the coupling structures 19 a, 19 b and returning the bent portions into original states. Reuse and discard can be very easily performed.

Modified Example of the Present Embodiment

A modified example of the present modified example (hereinafter, referred to as “the present modified example”) will be described referring to FIG. 4 to FIG. 6. The point of the present modified example different from the present embodiment is that the present embodiment includes the pair of standing pieces which are omitted in the present modified example. Therefore, the signs used in FIG. 1 to FIG. 3 are used as they are in FIG. 4 to FIG. 6. However, the packaging tool 1 in the present embodiment is represented as a packaging tool 1A in the present modified example.

(Packaging Tool and Packaging Box)

As illustrated in FIG. 4, the packaging tool 1A of the present modified example is common with the packaging tool 1 in basic configuration and action including the point that the packaging tool 1A preferably includes the plate-shaped member 3, for example, by stamping it out from a sheet of corrugated cardboard and the heat-shrinkable film (thin film member) 5 covering an object to be packaged as needed. Hereinafter, different portions will be mainly described, and the description of common portions will be omitted within a possible range so as to avoid overlapping.

As repeatedly mentioned, the pair of standing pieces are omitted in the present modified example. Therefore, four sides surrounding the mounting part 11 (mounting surface 11 a) are composed of stamped-out ends 12 k 12 k at one pair of opposed sides and bend lines 11 m, 11 m at another pair of opposed sides.

The preferable standing pieces 13 a, 13 b in the present embodiment have a function of restricting mainly a vertical movement in the packaging box 9, but the function is not obtained in the present modified example. Hence, though absolutely arbitrary, it is preferable to form an adhesive layer by an adhesive B or its alternative between the bottom surface of the packaging box 9 and the lower surface (rear surface) of the mounting part 11 as illustrated in FIG. 4. This is to prevent displacement and rolling around of the housed packaging tool 1A and object to be packaged G during transport.

(Packaging Procedure)

Next, the procedure of packaging the object to be packaged G using the packaging tool 1A will be described referring to FIG. 4 to FIG. 6.

First, the pressing pieces 15 a, 15 b are bent up along the bend lines 11 m, 11 m in the state illustrated in FIG. 5. Next, the coupling small pieces 17 ap, 17 ap′, 17 bp, 17 bp′ are bent along the bend lines 15 s, 15 s, 15 s, 15 s and coupled by the coupling structures 19 a, 19 b to complete the coupling pieces 17 a, 17 b. At this time, the mounting surface 11 a is in a state where the lateral four sides are surrounded by the pressing pieces 15 a, 15 b and the coupling pieces 17 a, 17 b.

Here, the object to be packaged G is mounted on the mounting surface 11 a and a possible range of the whole is covered by the heat-shrinkable film 5. In this state, the object to be packaged G is substantially enclosed by the mounting part 11 at the lower side, by the pressing pieces 15 a, 15 b and the coupling pieces 17 a, 17 b at the lateral four sides, and by the trapezoidal parts 15 ad, 15 bd, 17 ad, 17 bd at the upper side, and the heat-shrinkable film further covers the outside of them. Accordingly, the object to be packaged G is integrated with the packaging tool 1A, and therefore prevented from displacement, rolling and collapse.

Here, the packaging tool 1A is held and housed into the packaging box 9 with the upper covers 9 a to 9 d thereabove opened, and the upper covers 9 a to 9 d are closed and sealed with an adhesive tape (not illustrated), with which the packaging work is completed. Onto the bottom surface of the packaging box 9, the adhesive B is dripped in advance (see FIG. 4). The inner dimensions of the bottom surface of the packaging box 9 are preferably made to almost coincide with the maximum dimensions of the mounting part 11, so that the movements in the horizontal direction and the vertical direction of the packaging tool 1A and the object to be packaged G in the packaging box 9 are restricted in cooperation with the action of the adhesive B. Even in the case where the maximum dimensions of the mounting part 11 are smaller than the inner dimensions of the bottom surface of the packaging box 9, only dripping the adhesive B can prevent the movements in the horizontal direction and the vertical direction. Note that the adhesive B illustrated in FIG. 4 may be configured to automatically drip by a dispenser device or the like (not illustrated).

Taking-out of the object to be packaged G is performed by opening the upper covers 9 a to 9 d and pulling it up while peeling the adhesive (adhesive layer) B. By breaking the heat-shrinkable film 5, the object to be packaged G can be taken. The packaging tool 1A after removing the heat-shrinkable film 5 is returned into a sheet of corrugated cardboard by releasing the coupling structures 19 a, 19 b and returning the bent portions into original states. Reuse and discard can be very easily performed. 

What is claimed is:
 1. A packaging tool comprising: a mounting part comprising a rectangular mounting surface having one pair of opposed sides and another pair of opposed sides, for mounting an object to be packaged thereon; a pair of one and another pressing pieces provided to be able to bend and stand upward via another pair of bend lines, on the another pair of opposed sides of the mounting surface respectively; and a pair of one and another coupling pieces which couple opposed side ends of the one and another pressing pieces to keep a standing state of the one and another standing pieces, and configured to be able to be housed in a packaging box with the pressing pieces standing and coupled by the pair of coupling pieces.
 2. The packaging tool according to claim 1, further comprising: a pair of one and another standing pieces provided to be able to bend and stand upward via one pair of bend lines, on the one pair of opposed sides of the mounting part respectively.
 3. A packaging tool comprising: a mounting part comprising a rectangular mounting surface having one pair of opposed sides and another pair of opposed sides, for mounting an object to be packaged thereon; and a pair of one and another standing pieces provided to be able to bend and stand upward via one pair of bend lines, on the one pair of opposed sides of the mounting part respectively, and configured to be able to be housed in a packaging box with the standing pieces bending and standing upward, further comprising: a pair of one and another pressing pieces provided to be able to bend and stand upward via another pair of bend lines, on the another pair of opposed sides of the mounting surface respectively; and a pair of one and another coupling pieces which couple opposed side ends of the one and another pressing pieces to keep a standing state of the one and another standing pieces.
 4. The packaging tool according to claim 1, wherein: one trapezoidal part is provided continuously at an upper end of the one pressing piece, the one trapezoidal part having a lower bottom of the same length as a length of the upper end of the one pressing piece and tapering upward; and another trapezoidal part is provided continuously at an upper end of the another pressing piece, the another trapezoidal part having a lower bottom of the same length as a length of the upper end of the another pressing piece and tapering upward.
 5. The packaging tool according to claim 4, wherein the one coupling piece comprises one and another coupling small pieces configured to be able to bend in opposed directions via bend lines from the one pressing piece and the another pressing piece respectively; and the another coupling piece comprises one and another coupling small pieces configured to be able to bend in opposed directions via bend lines from the one pressing piece and the another pressing piece respectively, and the packaging tool further comprising: one detachable coupling structure between the one coupling small piece and the another coupling small piece opposed thereto; and another detachable coupling structure between the one coupling small piece and the another coupling small piece opposed thereto.
 6. The packaging tool according to claim 5, wherein: an upper end of the one coupling piece when coupled by the one coupling structure is formed almost parallel to the mounting surface, and one pair of trapezoidal parts having a lower bottom of the same length as a length of the upper end and tapering upward are provided continuously at the upper end; an upper end of the another coupling piece when coupled by the another coupling structure is formed almost parallel to the mounting surface, and another pair of trapezoidal parts having a lower bottom of the same length as a length of the upper end of the another coupling piece and tapering upward are provided continuously at the upper end; the one coupling structure is formed across the one coupling piece and the one pair of trapezoidal parts; and the another coupling structure is formed across the another coupling piece and the another pair of trapezoidal parts.
 7. The packaging tool according to claim 2, further comprising: a cylindrical heat-shrinkable film penetrating in a direction of the pair of pressing pieces, wherein the heat-shrinkable film is capable of covering by heat shrinkage a part or whole of the packaging tool except the pair of standing pieces, together with the object to be packaged mounted on the mounting surface.
 8. A packaging box for housing the packaging tool according to claim 2 and having an upper part being openable and closable, formed in dimensions capable of restricting movements in horizontal and vertical directions of the packaging tool when the packaging tool is housed therein with the standing pieces standing and the upper part is closed.
 9. The packaging tool according to claim 1, further comprising: a cylindrical heat-shrinkable film penetrating in a direction of the pair of pressing pieces, wherein the heat-shrinkable film is capable of covering by heat shrinkage a part or whole of the packaging tool, together with the object to be packaged mounted on the mounting surface. 